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  • Re: An Audyssey Question

    That large null at 80 hz that Audyessy is trying to correct is likey to be
    1)the sub being out of phase with the mains2)and or crossover on sub itself set too low 3)A room induced cancelation do to subs location.
  • Re: SDA-SRS 3.1TL - Need Assistance with Feedback Problem

    Everyone I've discussed this with at Emotiva, including this tech, asks somebody else whether this amp is common ground and consistently have the same answer, but if they're asking the same person, or getting information from the same source, then that explains why.
    Its the definition of common ground that's confusing things. Emo's tech is defining it as the negative binding posts of each channel being at ground potential,and he is correct. However the channels grounds are isolated from each other with a small amount of resistance. Polk defines common ground as having no resistance(other than that of the wire) between the negative binding posts to avoid the kind of issue you are experiencing. Others with similarly configured amplifiers have reported having similar issues to yours that were fixed by simple strapping.

  • Re: Making a change

  • Re: The DEMON is coming...

    heiney9 wrote: »
    The Ford GT was throw back to an icon, so it has that going for it and I suspect why it tends to garner so much green. Atleast that's a small part of the equation. The top dollar getters are trailer queens w/ almost no miles, still in plastic wrap.

    4038 GT's were produced between 2004-2006

    For the Demon to even come close to the status of the GT, it needs to sit and not get driven at all.

    I love the new GT. Sure it departs much further from the look of the original but it is one nice little car.

  • Re: SDA design question

    xschop wrote: »
    ... but in mine it elucidates the fact that it takes more power to run a passive radiator.
    A PR is not inherently less efficient than a port. My guess is that you may be using too short of a port thus pushing its tuning frequency higher than optimum and a higher frequency than what the PR is tuned to. The result would cause a bass boost (deviation from flat)around the tuning frequency that would give the impression of deeper and more powerfull bass.While the bass may sound louder it would in fact be less extended. For best results you will need to find out what frequency the PR is tuned to. Then adjust your port length to tune it to that same frequency. Otherwise you are comparing apples and oranges. The tuning frequency of a PR is adjusted by adding or removing mass(weight) to it. Of course the tuning frequency of the mass of air in a port is tuned by adjusting it's diameter and length. Internal cabinet volume and driver characteristics(Q,Fs and compliance) are all inter-related with the tuning frequency.

    Post edited by FTGV on

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